Liquid Oxygen/440C Compatibility
Liquid Oxygen/440C Compatibility
(OP)
Does anyone know of a NASA or MIL-STD that deals with the compatibility of liquid oxygen and 440C and other stainless steels? I'm looking more for chemical resistance than ignition resistance.





RE: Liquid Oxygen/440C Compatibility
As both C/S, 9%Ni, and S/S are used with LO2 I can see no problem with corrosion.
As you are probably aware it’s the gas phase that does the damage. You are well below the ignition point of metals.
I would expect the 440C S/S to be very brittle at LO2 temperatures.
If there is any data you will probably find it in the ASM Materials Handbook.
www.asminternational.org
RE: Liquid Oxygen/440C Compatibility
and do a search with the "liquid oxygen" keywords. I did such a search and found for example MIL-D-19326H Title: DESIGN AND INSTALLATION OF LIQUID OXYGEN SYSTEMS IN AIRCRAFT, GENERAL SPECIFICATION FOR
This MIL-STD lists many other MIL-STD and MS parts for use with liquid oxygen. The MS usually give the material for the part.
RE: Liquid Oxygen/440C Compatibility
440C and other ferritic and martensitic S.S. have nil ductility/toughness at the cryogenic temperature of LOX as indicated by unclesyd.
RE: Liquid Oxygen/440C Compatibility
RE: Liquid Oxygen/440C Compatibility